Not a fun road - I think the first hundred feet (pictured) are pretty representative of the remainder (at least to tree line). Lots of big rocks pinging my running boards and skid plate (stock 2014 4Runner). I wouldnt try this with any less clearance, at this point. I imagine the road is basically as good as it actually gets, right now, but I can imagine it getting significantly worse after an afternoon rain.
If you can get to the creek, you can probably get just about as high as you want.